HD 147506

Cet article est une ébauche concernant une étoile et une exoplanète.

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HD 147506
Données d'observation
(époque J2000.0)
Ascension droite 16h 20m 36,3579s[1]
Déclinaison +41° 02′ 53,109″[1]
Constellation Hercule
Magnitude apparente +8,71

Localisation dans la constellation : Hercule

(Voir situation dans la constellation : Hercule)
Caractéristiques
Type spectral F8V
Astrométrie
Vitesse radiale −20,36 ± 0,35 km/s[1]
Mouvement propre μα = −10,312 mas/a[1]
μδ = −29,198 mas/a[1]
Parallaxe 7,797 5 ± 0,025 8 mas[1]
Distance 128,246 ± 0,424 pc (∼418 al)[1]
Caractéristiques physiques
Masse 1,35 (± 0,1) M☉[2]
Rayon 1,8 (± 0,25) R☉[2]
Température 6 290 (± 110) K[2]
Métallicité [M/H] = 0,12 (± 0,08)[2]
Âge 2,7 ± 1,4 × 109 a[2]
Système planétaire
Planètes Une connue (HAT-P-2b)

Désignations

HAT-P-2, Hunor, BD+41°2693, HIP 80076, SAO 46035, TIC 39903405, TOI-2020[3]

modifier

HD 147506, aussi connue comme HAT-P-2, est une étoile de type spectral F8V située dans la constellation d'Hercule. Elle est distante de ∼ 418 a.l. (∼ 128 pc) du système solaire[1].

Système planétaire

Caractéristiques des planètes du système HD 147506
Planète Masse Demi-grand axe (ua) Période orbitale (jours) Excentricité Inclinaison Rayon
 HAT-P-2 b  8,74 (± 0,26) MJ   0,520 ±0,010   5,633 47 ±0,000 006 1   0,517 1 (± 0,003 3) 

Une planète massive (8,7 MJ), appelée HAT-P-2 b, a été détectée en 2007[4].

Cette planète complète une révolution autour de son étoile tous les 5,63 jours, l'approchant jusqu'à 4,9 millions de km avant de s'en éloigner jusqu'à 15,4 millions de km sur une orbite très excentrique (e = 0,5).

Voir aussi

Articles connexes

Liens externes

Notes et références

  1. ↑ a b c d e f g et h (en) A. G. A. Brown et al. (Gaia collaboration), « Gaia Data Release 2 : Summary of the contents and survey properties », Astronomy & Astrophysics, vol. 616,‎ , article no A1 (DOI 10.1051/0004-6361/201833051, Bibcode 2018A&A...616A...1G, arXiv 1804.09365). Notice Gaia DR2 pour cette source sur VizieR.
  2. ↑ a b c d et e (en) « Star: HD 147506 », Extrasolar Planets Encyclopaedia (consulté le )
  3. ↑ (en) HD 147506 -- Star sur la base de données Simbad du Centre de données astronomiques de Strasbourg.
  4. ↑ (en) Bakos et al., « HAT-P-2b: A Super-Massive Planet in an Eccentric Orbit Transiting a Bright Star », The Astrophysical Journal, Astrophysical Journal, vol. preprint,‎ , preprint (lire en ligne).

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